The check_secret function in authenticate.c in rsync 3.1.0 and earlier allows remote attackers to cause a denial of service (infinite loop a
The check_secret function in authenticate.c in rsync 3.1.0 and earlier allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a user name which does not exist in the secrets file.
- Published
- Apr 23, 2014
- Updated
- Jun 16, 2026
- EPSS
- 4.1% · 90th percentile
- CWE
- CWE-20
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 4.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| samba | rsync | cpe:2.3:a:samba:rsync |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- samba rsyncup to 3.1.0 inclusive
- samba rsync2.6.9
- samba rsync2.7.0
- samba rsync2.7.1
- samba rsync2.7.2
- samba rsync2.7.3
- samba rsync2.7.4
- samba rsync2.7.5
- samba rsync2.7.6
- samba rsync2.7.7
- samba rsync2.7.8
- samba rsync2.7.9
- samba rsync2.8.0
- samba rsync2.8.1
- samba rsync2.8.2
- samba rsync2.8.3
- samba rsync2.8.4
- samba rsync2.8.5
- samba rsync2.8.6
- samba rsync2.8.7
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | rsync | before 3.1.0-3 | 3.1.0-3 |
| openSUSE:Tumbleweed | rsync | before 3.1.2-1.5 | 3.1.2-1.5 |
Same product
samba: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-12084Rsync: heap buffer overflow in rsync due to improper checksum length handling61This week
- CVE-2017-16548The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0' character in an xattr name, w41Plan
- CVE-2017-17434The daemon in rsync 3.1.2, and 3.1.3-development before 2017-12-03, does not check for fnamecmp filenames in the daemon_filter_list data str40Plan
- CVE-2017-15994rsync 3.1.3-development before 2017-10-24 mishandles archaic checksums, which makes it easier for remote attackers to bypass intended access39Monitor
- CVE-2026-53791rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header36Monitor
- CVE-2026-70461rsync 3.2.5 < 3.5.0 Heap Out-of-Bounds Write via files-from Entry35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:rsync | 3.1.0-3 · Debian:12 | Package registry (OSV) |
| opensuse:rsync | 3.1.2-1.5 · openSUSE:Tumbleweed | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- C · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- C
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- advisories.mageia.org/MGASA-2015-0065.html
- lists.fedoraproject.org/pipermail/package-announce/2014-April/131910.html
- lists.opensuse.org/opensuse-updates/2014-05/msg00006.html
- secunia.com/advisories/57948
- www.mandriva.com/security/advisories?name=MDVSA-2015:131
- www.openwall.com/lists/oss-security/2014/04/14/5
- www.openwall.com/lists/oss-security/2014/04/15/1
- www.ubuntu.com/usn/USN-2171-1
- bugs.launchpad.net/ubuntu/+source/rsync/+bug/1307230
- bugzilla.samba.org/show_bug.cgi?id=10551
- git.samba.org/?p=rsync.git%3Ba=commit%3Bh=0dedfbce2c1b851684ba658861fe9d620636c56a
Vendor advisories and official records. Exploit/PoC links are deliberately left out.